Wireless headphones?

[fraggle]

Hi,

Are these any use? Which frequency bands do they operate on? I use WiFi (802.11b which works on 2.4GHz) throughout the house so can't have anything else operating in that freq band.

Also whats the quality of these things like? Would/could they compare to say £100 open wired phones?

Also are any of these "surround sound"/SRS/5.1 headphones any good?

Recommendations?

Thanks